/* ═══════════════════════════════════════════════
   Do Kaudi — Brand Design System
   ═══════════════════════════════════════════════ */

:root {
    /* ── Colors ── */
    --dk-black: #000000;
    --dk-white: #ffffff;
    --dk-text: #1d1d1f;
    --dk-text-secondary: #86868b;
    --dk-text-tertiary: #d2d2d7;
    --dk-blue: #0071e3;
    --dk-blue-hover: #0077ed;
    --dk-surface: #f5f5f7;
    --dk-surface-raised: rgba(255, 255, 255, 0.95);
    --dk-border: rgba(0, 0, 0, 0.08);
    --dk-overlay: rgba(255, 255, 255, 0.72);

    /* ── Typography ── */
    --dk-font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

    /* ── Radius ── */
    --dk-radius-sm: 8px;
    --dk-radius-md: 12px;
    --dk-radius-pill: 980px;

    /* ── Transitions ── */
    --dk-ease: cubic-bezier(0.25, 0.1, 0.25, 1);
    --dk-duration: 0.3s;
}


/* ── Base ── */

.dk-base {
    font-family: var(--dk-font);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    color: var(--dk-text);
}


/* ── Typography Scale ── */

.dk-display {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.03em;
}

.dk-headline {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.08;
    letter-spacing: -0.025em;
}

.dk-title {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: -0.02em;
}

.dk-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    font-weight: 400;
    line-height: 1.4;
    color: var(--dk-text-secondary);
}

.dk-body {
    font-size: clamp(1rem, 1.5vw, 1.15rem);
    font-weight: 400;
    line-height: 1.5;
    color: var(--dk-text-secondary);
}

.dk-label {
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--dk-text-secondary);
}

.dk-overline {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--dk-blue);
}


/* ── Buttons ── */

.dk-btn {
    display: inline-block;
    padding: 0.85rem 2.25rem;
    font-family: var(--dk-font);
    font-size: 1.05rem;
    font-weight: 500;
    text-decoration: none;
    border: none;
    border-radius: var(--dk-radius-pill);
    cursor: pointer;
    transition: background var(--dk-duration) var(--dk-ease),
                color var(--dk-duration) var(--dk-ease),
                transform var(--dk-duration) var(--dk-ease);
}

.dk-btn:hover {
    text-decoration: none;
}

.dk-btn--primary {
    background: var(--dk-blue);
    color: var(--dk-white);
}

.dk-btn--primary:hover {
    background: var(--dk-blue-hover);
    color: var(--dk-white);
}

.dk-btn--outline {
    background: transparent;
    color: var(--dk-blue);
    border: 1.5px solid var(--dk-blue);
}

.dk-btn--outline:hover {
    background: var(--dk-blue);
    color: var(--dk-white);
}

.dk-btn--ghost {
    background: transparent;
    color: var(--dk-blue);
    padding: 0.5rem 0;
}

.dk-btn--ghost:hover {
    color: var(--dk-blue-hover);
}

.dk-btn--ghost::after {
    content: ' \203A';
    font-size: 1.2em;
    transition: transform var(--dk-duration) var(--dk-ease);
    display: inline-block;
}

.dk-btn--ghost:hover::after {
    transform: translateX(4px);
}


/* ── Sections ── */

.dk-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 6rem 2rem;
    position: relative;
    overflow: hidden;
}

.dk-section--full {
    min-height: 100vh;
}

.dk-section--dark {
    background: var(--dk-black);
    color: var(--dk-white);
}

.dk-section--dark .dk-subtitle,
.dk-section--dark .dk-body {
    color: var(--dk-text-secondary);
}

.dk-section--light {
    background: var(--dk-white);
    color: var(--dk-text);
}

.dk-section--alt {
    background: var(--dk-surface);
    color: var(--dk-text);
}

.dk-section__inner {
    max-width: 980px;
    width: 100%;
}


/* ── Reveal Animations ── */

.dk-reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.7s var(--dk-ease), transform 0.7s var(--dk-ease);
}

.dk-reveal--visible {
    opacity: 1;
    transform: translateY(0);
}

.dk-reveal[data-delay="1"] {
    transition-delay: 0.12s;
}

.dk-reveal[data-delay="2"] {
    transition-delay: 0.24s;
}

.dk-reveal[data-delay="3"] {
    transition-delay: 0.36s;
}


/* ── Feature Cards (for scroll sections) ── */

.dk-feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 680px;
}

.dk-feature__number {
    font-size: clamp(4rem, 8vw, 7rem);
    font-weight: 700;
    line-height: 1;
    letter-spacing: -0.04em;
    color: var(--dk-text-tertiary);
    opacity: 0.35;
    margin-bottom: 1.5rem;
}

.dk-section--dark .dk-feature__number {
    color: rgba(255, 255, 255, 0.08);
    opacity: 1;
}

.dk-feature__label {
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--dk-blue);
    margin-bottom: 1rem;
}

.dk-feature__title {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

.dk-feature__desc {
    font-size: clamp(1rem, 1.5vw, 1.15rem);
    font-weight: 400;
    line-height: 1.6;
    color: var(--dk-text-secondary);
    max-width: 520px;
}

.dk-feature__icon {
    font-size: 2rem;
    color: var(--dk-text-tertiary);
    margin-bottom: 1.5rem;
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    background: var(--dk-surface);
}

.dk-section--alt .dk-feature__icon {
    background: var(--dk-white);
}


/* ── Divider ── */

.dk-divider {
    width: 40px;
    height: 2px;
    background: var(--dk-text-tertiary);
    border: none;
    margin: 2rem auto;
}

.dk-section--dark .dk-divider {
    background: rgba(255, 255, 255, 0.12);
}


/* ── Links ── */

.dk-link {
    color: var(--dk-blue);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--dk-duration) var(--dk-ease);
}

.dk-link:hover {
    color: var(--dk-blue-hover);
    text-decoration: underline;
}


/* ── Page Loader ──
   Usage:
     HTML:  dkLoader.show('Loading data...')
     Hide:  dkLoader.hide()
   The element is auto-injected by layout.html.
   ─────────────────────────────────── */

.dk-page-loader {
    display: none;
    position: fixed;
    z-index: 9999;
    inset: 0;
    background: rgba(255,255,255,0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    align-items: center;
    justify-content: center;
}
.dk-page-loader.active { display: flex; }
.dk-page-loader { transition: opacity 0.2s ease; }

.dk-page-loader__card {
    text-align: center;
    background: var(--dk-surface-raised, #fff);
    padding: 2rem 2.5rem;
    border-radius: var(--dk-radius-md);
    border: 1px solid var(--dk-border);
    box-shadow: 0 8px 32px rgba(0,0,0,0.08);
}

.dk-page-loader__logo {
    width: 36px;
    height: 36px;
    margin: 0 auto 0.75rem;
    animation: dkLoaderPulse 1.6s ease-in-out infinite;
}

.dk-page-loader__text {
    font-family: var(--dk-font);
    font-size: 0.8125rem;
    color: var(--dk-text-secondary);
    margin: 0;
}

@keyframes dkLoaderPulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50%      { opacity: 0.4; transform: scale(0.92); }
}

/* Inline spinner variant (for buttons, sections) */
.dk-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid var(--dk-border);
    border-top-color: var(--dk-blue);
    border-radius: 50%;
    animation: dkSpin 0.6s linear infinite;
}
.dk-spinner--sm { width: 12px; height: 12px; border-width: 1.5px; }
.dk-spinner--lg { width: 24px; height: 24px; border-width: 2.5px; }

@keyframes dkSpin {
    to { transform: rotate(360deg); }
}

/* Section-level loader (centered in a container) */
.dk-section-loader {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 2rem;
    color: var(--dk-text-secondary);
    font-size: 0.8125rem;
    font-family: var(--dk-font);
}